Tools > Auto Configuration Wizard
15:37:12.592: Windows Version: 10.0 Build 17134 (revision: 523; 64-bit)
15:37:12.592: Running as administrator: false
15:37:12.592: Aero is Enabled (Aero is always on for windows 8 and above)
15:37:12.592: Windows 10 Gaming Features:
15:37:12.592: Game Bar: On
15:37:12.592: Game DVR: On
Windows is out of date. Run October 2018 update and turn off Game Mode, Game Bar and Game DVR, as these all negatively impact performance.
15:37:13.682: fps: 100/1
What platform are you recording 100fps for? At any rate, there is no way it is going to look good at 2500 bitrate. You should not be using CBR for recording anyway, and even if you did, not this low. Read the guides on local recording. Use basic settings and high or indistinguishable quality and pick a standard framerate (30 or 60) unless there is a particular reason not to.
https://obsproject.com/wiki/OBS-Studio-Overview